Typewriting machine



Jan. 3, w DOBSON TYPEWRITING MACHINE Filed Jan, 16, 1956 2 Sheets-Sheet 1 I Jan. 3, 1939. w DOBSON 2,142,241

TYPEWRITING MACHINE Filed Jan. 16, 1936 2 Sheets-Sheet 2 XXXXXX- 72 XXXXXXXX 8 xxxxxxxx XXXXXXXXX- 73 Y XXX- w b5 Patented Jan. 3, 1939 1 UNITED STATES PATENT oFricE TYPEWRI'IING MACHINE William A. Dobson, Wethersfield, Conn., assignor V to Underwood Elliott. Fisher Company, New

York, Y., a. corporation of Delaware Application January'16, 1936, Serial No. 59,361

24 Claims. (01. 197-63) r y This invention relates to'typewriting machines, and especially to' devices'for expediting the setting of marginal stops to vary the length of'the' Writing-line.

5 This invention is particularly adaptable to' -machines of the Portable class, which are used, generally for correspondence onlyyby unskilled, or non-professional operators. variesgreatly in sizejanditis therefore desirable to have margin-gaging means of great flexibility, so that the line-lengthmay be easily and quickly adjusted to suit the size of the stationery and the length of the letter. a

Generally, in such correspondence, the necesnature-line, and by the use of suitable tabulatorstops to co-operate with the margin-gaging stops,

the space-relationship of .such constantly-recurring indentationsmay be maintained uniformly regardless of the line-length selected.

It is a feature of this. invention that the operator may selectma'ny different line-lengths without .the necessity of setting thestops individually. To establish the writing-linejwith even margin-lines on each side of thesheet'; and simultaneously to establish the various indented positions, it is necessary for the operator only to insert the stationery around the platen in the usual manner and move the carriage rightwardly to the desired left margin, which willbe determined by the position of the printing-point, or

type-guide position. A knob, conveniently placed at the rear of'the carriage, is then turned as far as it will'go, and then fractionally turned in the reverse direction so that suitable detent-means i may operate to secure the adjustment, and the machine is ready for operation. The paragraphindentation, and date-and-signature-line inden- 40 further manipulation. A line-end-signal device and a line-end keylock are usually both controlled in relation to the setting of the right-hand margin-stop, which comes into play at the finish of a line. An additional feature of this invention is that regardless of how the novel line-length-changing means are adjusted, such adjustment also assures that thesignal and key-lock will function in proper accord with the selected line-length. v

' In practicing this invention, a novel stop-shaft,

with helically-threaded right and left end por tions, and an unthreaded central portion, is

journaled, preferably behind the platen, in the carriage end-plates. The previously mentioned Social stationery sary line-indentations are limited to those for the date-line, paragraph-indentations, and sigtations are automatically established without.

' adjustment knobis preferably located outside of the right-hand end-plate. Thehelical threads at each end of the stop-shaft are of opposite pitch. A pair of margin-stops of novel design,

to establish left and right hand margins, are

threaded to co-operate with the left and right hand portions of the stop-shaft respectively, and are mounted thereon. 'A guide-rail, which is preferably graduated to serve additionally as a line' gaging and centering scale, ismounted on the, rear plate of the carriage to co-operate with suitable key-ways formed in the margin-stops to prevent therotation thereof.

The rotation of the adjustment knob by the operator thus causes the margin stops to travel laterally on the shaft, approaching or withdrawing from'each other at an equal rate, depending on "the direction of rotation of the knob. The margin-stops are arranged to co-operate with the usual; non-traveling counter-stop,

whereby the letter-space travel of the carriage is arrested. I

To establish paragraph-indentations, the lefthand margin-stop may be formed with an auxiliary stop-face carried to the right of the margin-stop face in such manner as to maintain an indentation of one inch with respect to the left-hand margin-line, by co-operating with a tabulator "counter-stop and carriage-release means of familiar and standard design.

For such deep indentations as the date and signature lines require, a separate tabulatorstop is slidably mounted-on the unthreaded central portion of the stop-shaft, and adjustably connected'to the right-hand margin-stop by a rigid'link'or draw-bar. Thelateral motion of the margin-stop thus projects or retracts the tabulator-stopequally, and the alignment of the a date and signature "lines is assured.

Obviously it is not necessary to restrict the use of the tabulator-stops to paragraph or signature line indentations, as they can be used with equal facility in making simple columnar tabulations. Y v The device may be concealed from'view by housing it in the space formed by the rear plate of the carriage and the upper portion of the paper-table. The latter may be suitably hinged to be swung forward to permit reference to the scale, or inspection of the line-gaging device.

Other features and advantages will hereinafter appear.

In the accompanying drawings, Figure 1 isa fragmentary perspective of a typewriter of the portable class, illustrating the novel margin-gaging means, the associated tabulator-stops, the coacting counter-stops, the carriage-escapement release and the line-lock mechanism.

Figure 2 is an elevation, showing the stopshaft of Figure 1 in section, and an end view of the combination left margin-stop and paragraph-tabulator, and additionaly illustrating the marginal counter-stop and the tabular counter- -stop in inoperative and operative positions.

Figure 3 is a view similar to Figure 2, illustrating the tabulator-stop used for establishing signature-indentation.

Figure 4 is an end elevation of the machine stop mechanism are housed within the rear plate of the machine-carriage and the upper portion of the paper-table.

Figure'5 is a diagrammatic representation of a typical typewritten letter. I Figure 6 is a diagrammatic representation of the cooperation of margin-stop and margin counter-stop to establish the left-hand writing margin.

operation of the tabulator counter-stopandthe paragraph-establishing stop-face of the lefthand margin-stop for establishing the para graph-indentation.

Figure 8 illustrates the co-operation of the tabulator counter-stop and the intermediate tabulator-stop to establish the date-line and signature-line.

Figure 9 is a diagrammatic representation of right-hand margin-establishing means, illustratlng the relation of endof. line-signal to the I key-lock, and additionally illustrating the operation of the end of line key-lock.

Figure 10 is a diagrammatic representation of a typewritten letter having a'short writing line H with marginal notations.

, Figure 11 illustrates thecamming action of the left-hand margin-stop as the carriage is returned;

to a new writing-line position after having been brought past the margin-stop to type a marginal notation.

Referring to Figures 1 and 4, represents, a 5

portion of a carriage case-shift frame of a typewriter of the well-known Underwood Portable class, on which a laterally slidable carriage 26 is 7 carried by means of the usual runways 21 00- operating with carriage-tracks '28 and anti-fric tion elements 30. A letter-feedrack 3| pivotally mounted on the carriage meshes-with a pinion The novel carriage-stop organization is as follows: A helically-grooved stop-shaft is journaled,

in such manner as to prevent its lateral movement, in the carriage end-plates 40, 4|, behind the platen 38. Shaft45 has a portion of its lefthand end (as seen in Figure 1') formed with a squarewut right-hand thread or groove 46, and

Figure .7 illustrates, diagrammatically, the co- .shock resulting from the sudden mean-u these threads is a suitable multiple of the letterspace pitch, say t; of an inch lead, or four times the usual letter-space pitch of 1 5 inch. Four threads, inch apart, are cut in such case. The central portion of the shaft 45, occupying somewhat less than one-third of the total length, is left with a smoothly cylindrical surface of full diameter. At preferablythe left-hand end-plate 4i, shaft 45 is formed with a squared end 48 forming four lands to co-operate with a doubleleaved spring-detent 50, carried on a suitable stud 5|, to gage quarter turns of the shaft 45. At the right-hand end-plate 40, the shaft 45 may terminate in a suitable knob 52, by means of which the'operator may manually rotate the shaft to establish the margin-positions, as will later be described.

Formed to ride on shaft 45, Figure 1, and to be moved laterally by the rotation thereof, are a left-hand combination margin and tabulator stop 53, a right-hand margin-stop 54 and an intermediate, tabulator-stop 55. Stops 53 and 54 are formed with collars 58, threaded to co-operate with the threads on shaft 45. The collars 56, like the shaft 45, have four threads, as indicated in section inFigures 2 and 3, to withstand the arrest of the carriage movement.

The left-hand stop 53, Figures 1. and 2, is formed with an extended integral rim 51, preferably concentric with the shaft 45 and cut away inthe lower right quadrant to clear the framerunway 21, as shown in Figure 4. The lower portion of saidrim forms a stop-face 59 to co operate with a margin counter-stop 59 of usual design, for establishing the left-hand margin. A rightwardly-extending,arm on stop 53 terminatesin a stop-face 5| for line indentation or tabulation purposes. The stop-face BI is preferably so spaced with relation toface 59 to give a one inch indentation of line from the established left-hand margin.

The right-hand margin-stop 54, Figures 1 and 4, has a similar rim 51, the lower part of which forms a. stop-face 59 to co-operatewith said margin counter-stop 59 to establish the righthand margin.

. The margin counter-stop 59 is located intermediately of said margin-stops and, by suitable mechanism and control means later to be described in detail, co-operates with said marginstops to arrest the carriage travel at the established line-margins.

The intermediate stop is arranged to ride slidably on the unthreaded central portion of the shaft 45, as shown in Figures 1 and 3, and includes a body 92 of suitable depth to give rigidity to-the stop, and a faceor rim 83 to coact with a tabulator counterstop face 54 to establish deep line-indentations, such as a date-line or a signature-line, or intermediate, tabulated material. As shown in Figure 3, substantially the lower half of theface 63 is cut away to permit stop 55 to pass over margin counter-stop 59.

The rim-portions of the stops 53, 5.4 and 55 1 have a keyway 65 out in the rear thereof, said 'keyway located in each stop in a horizontal radial line with respect. to shaft 45, as indicated in Figures 2, 3 and 4. These keyways permitsaid rimportions to embrace, as shown, a horizontal forwardly-extending line-gaging, scale 65 which is welded, or otherwise secured, to a rear plate 61 of the carriage 26. a

It will be seen, therefore, that as the operator rotates 'theshaft 45 by means ofthe knob 52,

59, arresting the letter-feed motion of the car- 1,

' each end of the bar 68, a series of holes H is pro- I vided to permit adjustment of the relative spacingof the two stops.

The s'top s is therefore moved'withthe stop 54, andremains indeiinitrelation thereto. The purpose of mounting stop 55 slidably on an un- "threaded portion of the shaft 45' is to permit the ready adjustment of said stop with respect to stop '54, although such adjustmentis seldom needed,

as-it has been found that an adjustment of stop 55Qwhich will permit a two-inch writing-line,

measured from the rightehand margimis satis factory regardless of the line-lengthas measured bythe margin-stops Hand 54. I p

To prevent anypos'sibility of'interference between the bar 68 and the left-hand margin-stop 53, the rim 51 of stop 53 istopped, as shown in Figures 1 and 2, permitting thebar 68 to pass over said rim without interference. f r r The operator, after feeding the stationery 12, Figure 6, around the platen 38 in the usual manner and centering the stationery on the. platen,

establishes the desired left and righthand margins, by moving the carriage 26 to the right until the desired left-hand margin-position is behindthe printing-point, represented by a typeguide 13 in Figure 6. The knob 52 is rotated rearwardly, causingstops 53 and 54'to approach each other at an equal rate, because of the equally, but oppositely, threaded ends of shaft 45, stop 54 I projecting tabulator-stop 55 before it. The extent to which the stops 53 and 54 can be moved is determined by the contact of stop 53 with counter-stop 58. At this point, the operator turns the knob forwardlya fraction of a revolution, until one of the faces of the squareend 48 is grasped by the springdetent 50.

In this simple manner, the left and right hand margins and the intermediate indentations, such as paragraph and signature indentations, are simult'aneously established.

carriage 26 from the control of the escapement mechanism, and swings the tabulator counter stop face 64 into the path of tabulator-stop55,

arresting the free leftward movement of the carriage at thedesiredpoint' The typewriting proriage. The engagement of contact-face 58 of the left-hand counter-stop 53 similarly establishes the left-hand margin of a new writing-line,

' as shown'in Figure 6.

' position at which the counter-stop 59 is engaged with the left margin-stop 53, depression ofthe tabulator-key I5 will bring the counter-stop 64 intoe'ngagement with the paragraph-stop 6 I. For this" reason, when it is desired to stop the carcarriage so that same moves to the date-line deof two modes of operation so as to avoid arresting the, carriage by stop engaging the counterstop 84. In the first mode of operation, the carriage may be gradually released-by repeated operation of the usualspacer-bar for a' distance termining' position, as defined b y'engagement of counter-stop with tabulator-stop 55, by either sufficient to move stop 6| beyond counter-stop 64, after which the carriage inay'bereleased for the remainder of the leftward movement by depressing the'tabulator-key 15. The second mode of operation is that of merely depressing the tabulator-key twice, the firstjreleasing-the carriage to the paragraph-stop position defined by stop 6|, the second depression of the tabulator-key releasing the carriage to the date-line position at which counter-stop 64 engages the tabulator-stcp 55. v To indent fora paragraphfas shown in Figure '7, thecarriage is moved to the extreme left-margin-position, and, by similarly depressing the tabulator-key 15, thecarriage moves freely to the left, the tabulator ,counter-stopiface 64 is brought into the path of the stop-face 8 I, and the carriage is arrested at the correct point. Similarly, the indentationfo-r the signature-line may be quickly and accurately established through the co-operation of the tabulator counter-stop and the in- .Said face 64 is brought into the pathof the tabulator stop-faces by known means,jin which the depression of the tabulator key 15 rotates an associated key-lever 16 clockwise of Figure 1, about a suitable fixed pivot 11, and draws forward a U-shaped slide 18, pivotally secured, to lever 16 at 80, and s'lidably mounted on a fixed bracket 8| by meansof a slot-and-screw arrangement 82, 83. The forward motion of slide 18,; through the intermediary of a' cam-slot 84 formed in an obliquely upstanding arm 85 of the slide", and a pin '86 on an actuatinglever 81, rotates said lever forwardly about a fixed pivot 88, which is carriedby a lug 90 .of a bracket 9 l rigidly secured to a rear plate 92 of the case-shift frame 25. The

'actuating'lever 81 projects rearwardly and upwar'dly through a slot931in plateBZ, as shown ir Figure 1.

[ A"tab'ulatorcounterstop lever 94, which at its left end terminates in the stop-face 64, ispivoted, intermediate itsends, to the upper side of the rear carriage-runway 21, byascrew 85. The right end of said,tabulatorcounter-stop lever 94 is offset downwardly and projects to therear at 96, Figure 1. An opening or fork SHs provided at said rear projection-9B to receive-thef-ree upper end of the actuating lever 81, the forward motion of which causes the counter-stop face 64 to swing rearwardly and downwardly as shown in dotted lines in Figures 1, 2 and 3, into the path of a tabulator-stop.

To simultaneously, free the carriage from the rotates abell-crank lever I00, pivotally mounted on the bracket SI, and by a rigid link l0! alsov spring-m'otor 36 to draw the carriage 2G to the fat 4 i rotates a bell-crank I02 pivoted. asiit I03, to. a

suitable support, not shown. The leftward or free end of bellcra'nk I02 is'provided with a freely 'revolublo roller 01; idler I04, which is normally lightly in contact with the feed-rack I3I.

The rotational said bell-crank I02 thereby swings the met 3i" rcarwardly, against the, tension of a,

spring I05, about; suitable pivots I06 at the Car'- riage end-plates", 4I,'bringing saidrack out of mesh with the pinion 32 and permitting. the

"left until such motion is arrested by the coacting normal positions. For whatever lln'e-lengthis established by the rotationof the knob 52, it'is desirable that the 1' tion to bell crank I I5,;and therefore, as the stoptabulator-stops and tabulator counter-stop.

. On the release of thetabulator-key 15, a spring I01, secured to themachine-frame (not shown) andto'a'downward extensionl03 of the tabulator. key-lever 15, returns said key to its normal position against a bumper I09 in a front frameplate I I0, and permits the tabulatorv counter-stop -i, I to 'resumetheir,

lever 94 and carriage-rack" 3 usual line-end signal be given at the customary distance f'rom the endof the line, and'that the f determination of the right-hand margin-line be forced by a positive line -end key-lock.

To-this end a finger I I5, Figure 1, havingia tip carried normally in the path. of the margin-stops 53 and' 54 is pivotally mounted, several letterspaces to'theright of the margin counter-stop 53, on a bell crank IIB, pivoted to the rear plate 02 of the shift-frame 25, as at. 1. The down wardarm II! of bell-crank II6 terminates in, a striker- I20 which is normally held within, and against the edge of, a suitable bell I2I, by. the" 1 action of a tensile spring I22, joining said arm III and afdow'nward extension I23 of a margin counter-stop slide-leverjl24 jAs shown in Figure 1, finger I I5 may not rotate leftwardly with relaface 55 of right margin-stop 54 contacts said finger near the end of the writing-line, the bell;

crank H5 is rotated about pivot, I I1' against the tension of spring I22. As the typewriting con: tinues, and the stop 54 overrides finger II5, the

bell-crank II5 will be freed to assume its normal position, and the spring I22 will cause the striker I 20; sharply to hit the'bell, signaling the approach 5 ing line-end.

embrace the upper portion of a Margin counter-stop 53, formed at the right end of counter-stop slide-lever I24, is held in the path of the margin-stops 53 and 54 through the action of'the spring I22which draws leveri I24 rightwardly to the limit of slot I25 through which lever I24 is pivotally and slidably mounted to the".

rear of carriage shift frame 25 by a headed screw I 25, and rotates the right end upwardly about, said'screw, such rotation being limited bythe slid:

able contact of the left endof lever I24 with a rearwardly-extending arm 'I 21 of a bell-crank I28. As shown in Fig'ure-1,the left end of. lever I24 is formed with a flange I and a guide-slot I3I, to

pivoted atthe rear of plate 32..

As the typing continues after theline-end slg-' nal,-the counter-stop lever I24; is driven left wardly by the engagement of right-hand stop-face 50 with the counter-stop. Flange I30'contacts the lever I32 and rotates it, counterclockwise 'of Figure 1, about its pivot I33. The, lower end of lever I32 causes the rotation of a bell -crank I34, suitably pivoted to the machine-frame at I35. The bell-crank, through the agency of a yieldable link I35, causes a key-locking bail I3I'to be swung,

pendent lever I3 U against the tension of a spring I38, under a locking shoulder .I40 with which each hey-lever I h is formed, preventing the actuation of said keylevers. Theline-lock action is diagrammatically shown. in Figure 9, which additionally indicates the usual relationship between the bell-signal and They-locking positions.

If. it should be found necessaryto complete a word before a new} li'neis started; thekey-lock may be released by pressing a margin-release button I42,, Figure 1-, which projects through the mac'hine'front plate H0 and is connected at its back, bymeans of a stiff push-rod I43 to a lower arm of the bell-crank I28. Said bell-crank is thus rotated against the power of a coiled spring I44,

and causes the reararmI2I of said bell-crank to 1 lift or swing the left end of the lever I 24 upwardly about jitspivot-screw I25, This depresses the counterestop 53v below the path of the margin-stop 54;and the spring I22 pulls thecounter-stop lever I24 to the right. The pendent lever I32'thus is relievedIof, its operating force, and the spring I30 swings the bail 'I3I out .of locking arrangement with the key-levers I which may then again be,ope rated' .to type the desired character The sp'rin'gjI38 also returns-thebell-crank I34 and pendent lever I32 to normal position. On the removal of pressurefrom the button I42, the coiled spring" I44. r eturns the bell-crank I20 to normal position, i 4 a The button 'I42 may also be used to render the left-hand margin-stop 53 similarly ineffective for the le'ftehand margin-line, when it is desired to make, left-handf marginal notations, as shown finFigure 1 0.

'Asshown, especially Figures and 11, the rear of the 'stop-faces 53 of margin-stops 53 and i, 5 4 are beveledtocam-the counter-stop 59 downward, so thatwhen the 'carriage has been permitted to travel'past thecounter-stop 53,.through the action of the margin-release button I42, it

may be returned either to the right or the left without additionally pressing button I42.

, As clearly shown in Figure '4, the stop-shaft, the'margin andtabulator stops and their associated counter-stops, are housed in,and protected vby, the rear plate 6110f the carriage and an upper sectionI of a paper-table I46. The section I45 vmay' be pivoted at end-plate on an extension I4'I'of stud 5I, and similarly pivoted at end-plate 40, to'permit the section to be rotated forwardly to permit the operatorto read the line-gaging 7 scale 66, or to adjust the relative spacing between stops 54 and 55.

v Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

.1. In a typewriting machine, the combination of a laterally slidable carriage, margin-gaging means comprising a threaded shaft: revolubly mounted in said carriage, means for rotating said shaft, a plurality of pairs. of stops mounted on said' shaft, the respective pairs of stops being arranged to approach vor withdrawv from each other depending on the direction of rotation of said shaft, keycontrollable means to govern the movement of said carriage, and a counter-stop arranged to be placed-in the path of certain of saidjilrst-mentioned stops to arrest thecarriage travel at a predetermined point.

) 2. In a typewriting machine having a frame, a laterally slidable, power-driven carriage mounted thereon, and key-controllable means to govern the movement of said carriage, margin-gaging v lable means for governing the movement thereof, line-gaging means comprising the combination meanscomprising the combination of a threaded shaft revolubly mounted in said carriage, a plurality of margin-stops mounted on Said shaft and arranged to be-laterally adjusted withfrespect to each other by the rotation of said shaft,-

and counter-stops arranged in the path of the margin-stops to arrest the carriage travel ata predetermined point.

3. Ina typewriting machinehaving a laterally slidable, power-driven carriage and key-controlwith'a stop-shaft, having an unthreaded, central I portion and oppositely threaded endportions,

margin-stops mountedon said end-portions and 'arranged to move laterally on said shaft by the rotation thereof, and an intermediate stop slida- I bly'mount'ed on said central portion andadjustably secured to'one'of said margin-stops so as .to' .bemov'ed therewith,of margin-gaging and tabu-. lator counter-stops arranged to co-operate with said shaft-stops to arrest the travel of said car-j 'riage.

4.} In a typewriting machine having a laterally slidable carriage, margin gaging means comprising the combination'of a left-and-right threaded i stop-shaft revolubly mounted insaid carriage, a plurality of margin-gaging stops therefor, with a counter-stop arranged in the path of said stops to arrest the carriage travel at a predetermined point, each margin-gaging stop having a threaded I portion to co-operate with said stop-shaft, and

means co-operating with a fixed trackway to pre-. r vent the-rotation of said stops in relation to the "stop-shaft;

-5. In a typewritingmachine having alaterally slidable carriage, a pair of margin-stops, means= mounting said margin-stops and manuallyoperable for simultaneously adjusting said margin- -stops toward or from each other to different positions lengthwise of the carriagefor establishing a desired line-length, a counter-stop located intermediate of said margin-stops to arrest the carriage'travel'at the desired marginal positions,

and means operable to withdraw-said counterstop from the path of said margin-stops to permit the carriage to'travel beyond the previously established marginal positions, said margin-stops and counter-stop being relatively arranged to permit the return of the carriage within the established line limits without additionally Inanipulating the counter stoprwithdrawal means.

6. In a typewriting machinehaving a laterally slidable carriage, a revoluble, screw-threaded stop-shaft journaled inpsaid carriage, a pair of screw-threaded margin-gaging stops carried on said shaft, an auxiliary stop mounted on said shaft in adjustable spaced relationship to one of I the margin stops, means for rotating said stopshaft; and means including a fixed guideway mounted in said carriage in horizontal relation-- ship to said stop-shaft and arms formed on said 1 stops to slidably embrace'said 'guldeway to prestop associated with said line-indenting stop, and a line-indenting key operable subsequently to the vent the rotation of the stops as the stop-shaft is rotatedfand thus enforce a lateralmovement of said stops.

7.--The' combination with a counter-stop, of a line-indenting stop carried by said carriage-return stop for concurrentfadjustmenttherewith, a normally- 'retracted countercarriage-return operation, said key being conletter-feeding. typing-machine carriage, a carriage-return stop adjustable along said carriage, and'a co-operative I nected and operable to release the carriage" for consequent automatic movement in letter-feed direction and toconcomitantly move said retracted line-indenting counter-stop into, position to coact with the line-indenting stop onthe carriage-return stop'jto limit said automatic movement for line-indenting; whereby adjustment of said carriage-return stop to any carriage-returnlimiting position automatically provides, without any additional adjustment, for effecting linev indenting, by means ofsaid lrey, withreference to said' position,

8. In a typewriting machine, the combination 7' with'a letter-feeding, carriage, of a'pair of right and left margin-stops, an intermediate lineindenting stop, counter-stop means co-operative with said margin-stopsand intermediate stop, and stop-setting means including a single manually-ope'rable line-'len'gth regulator and connections operatively 'conjoining .sa'id regulator and saidstops and arranged so that manual operation ofs'a'id single regulator shifts said margin-. stops in unison either toward or from each other, depending on the. operation of said single regulator, to determine both margin-positions of the carriages'imultaneously for different line-lengths, and concomitantly shifts the intermediate stop .to keepthe latter at .a predetermined distance "'fromo'ne of said margin-stops.

9; In a typewriter, the combination of a frame, a laterally movable carriage mounted thereon,

counter-stop means mounted on said frame in substantially fixed relation to said carriage, laterally adjustable rightv and left margin-stops and an intermediate, stop mounted in said carriage to loo-operate with said counter-stop means for. margin-gaging and intermediate I tabulating,

and a single screw-threaded spindle connected to said margin-stops and arranged relatively thereto, so that rotation of said spindle adjusts said right and left margin-stops in relation-to said counter-stop means, said intermediate stop mov ing in unison with one of said margin-stops.

, 10. In a typewriter, the combination ofa frame, a laterally movable carriage mounted thereon, counter-stop means "'mountedon 'said frame in substantially fixed relation to said carriage, later-' ally adjustableright and left margin-stops and an intermediate stop mounted in said carriage to co-operate with said counter-stop means for margin gaging and intermediate tabulating a single screw-threaded spin'dle connected to said margin-stops and arranged relatively thereto, so

that rotation of said spindle adjusts said right and leftmargin-sto'ps in relation to said counterstop meanaand detent-means applied to said single spindletoassureithe adjustments ,of all of I said stops, said intermediate stop moving in unison with one of said margin-stops at predetermined steps ofadjustment.

11. In a typewriting machine having a frame, a laterally movable letter-feeding carriage mounted thereon, and key-controllable means to govern themovement of said carriage, margin-gaging.

means comprising the combination of right and left margin-stops, stop shifting mechanism, in-

eluding a line-lengthregulator, operableby manipulating said regulator for shifting said stops in" unison toward or from one another, and counter-stop means arranged to. co-operate' with said margin-stopsto arrest the carriage travel at a predetermined point,

'12'; In a typewriting machine havingaframe, a laterally slidable, power-driven carriage mounted thereon, and key-controllable means to govern n the movement of said carriage, margin-gaging means comprising the combination of a stopshaft, 9. pair ofright and left margin-stops 'car- I J ried on saidshaft, means including a stop-engag ing screw-thread on said shaft for causing lateral adjustments of said, stops in unison-toward or from each other by rotations of said shaft, and counter-stop means to co-operate with said margin-stops to arrest the carriage.

13. In a typewriting machine, .rlght and left I margin-stops adjustable to different positions lengthwise of the carriage for gaging the start and end of a line with reference to 'a certain width and position of a work-sheet, a, counter-, stop, means, having a, finger-piece, operatively connected to said margin-stops and operable by manipulating said finger-piece to shift said mar-Q gin-stops in'unison toward or from the counterstop to gage both margin-widths of the work- 'sheet for different line-lengths, and a member operable by a margin-stop to signal the approach of the carriage to the end of a line, said marginstop arrangedto operate said signal-member at substantially uniform distances from r the ends of the lines established by said means.

'14. In a typewriting machine havingfltypes and a letter-feeding carriage, the combination of a pair of margin-stops, means, having a flnger-' piece, operatively connected to saidmar'gin-stops I so and operable by manipulating saidflnger-pie'ce' to shift said margin-stops in unison toward or from each other to establish a variety of writingline lengths, counter-stop meansto cO-operate with said stops in margin-gaging, and type-controlling line-lock means controlled by one of said margin-stops to enforce the margin-gaging de-'" termination regardless of the length of writing} 1 line selected.

ofa letter-feeding reciprocatory carriage, right and left line-end -deflning carriage-stops, and

stop-shifting mechanism including a single man- 1 ually-operable line-length regulator, and a device along with the latter.

operable, by manipulating said single regulator, to shift said carriage-stops laterally along the path of carriage travel so as to variably predetermineboth the right and left line-end positions of. the carriage simultaneously in varying the linelength settings of said stops,

16; In a typewriting machine, the combination of a letter-feeding reciprocatory carriage, right and left line-end defln'ing carriage-stops, and stop-shifting mechanism including a single mang ually operable line-length regulator, and a device operable, by manipulating said single regulator, to shift saidcarriage-stops laterally. along the path of carriage travel so as to variably predetermine both the right and left line-end posi- "tions of the carriage simultaneously in {varying the line-lengthsettin'gsjof said' stops; and an' intermediate line-indenting stop, having a connection to oneof said stops so as to be shifted 1'7.' In a typewriting machine, the combination of a letter feeding reciprocatory carriage, right -and left line-end-deflning carriage-stops, and. stop-shifting mechanism including a single man- I "ually-operable line-lengthregulator,.and a device operable,.by manipulating said single regu- .lator, to shift said carriage-stopslaterally alongthe path of carriage travel so as to variably pre- 1 determine both the right and left line-end positions of the carriage simultaneously in varying the line-length settings of said stops; and an lntel-mediate line-indenting stop, having a connec- 'auaau said margin-gage site relative adjustments tionito one said stops so as to be shifted along [with the. latter, said connection being arranged foi v'arying the distance between said intermediate linefindenting stop and said one stop for predetermining line-indentations of different extents. V

18. The combination with a slidably mounted typewriter-carriage, of a pair of margin-stops, left and right, a iinedength regulator, means connecting. said regulator and margin-stops, and

"operative for shifting said margin-stops in unil9. Ina typewritlng machine, the'combination I with a letter-feeding carriage, of right and left hand margin-stops for said carriage, counterstop means for co-operating with said marginstops, and coacting margin-regulating screws having a common single, finger-piece, for varying both left-handand right-hand margins by effecting opposite relative adjustments concomitantly between said margin-stops and said counterstop means,

20. In a typewriting machine, the combination with a letter-feeding carriage, of right and left hand marginestops adjustable in respect to said carriage, threaded means jcommon to said margin-stops for effecting simultaneous opposite adjustment thereof to establish various writing-line lengths, a tabulating stop connected to one of v stops foradjustment therewith, and counterstops for said margin-gage and tabulating stops. 15. In a typewriting'machine, the combination 21. In a typewriting machine, the combination with a letter-feeding carriage, of right and left hand margin-stops for. said carriage, a counterstopfor co-operating with said margin-stops, co-

acting margin-"regulating screws having a common single finger-piece, for varying both lefthand and right-hand margins by, effecting oppo- -site relative adjustments concomitantly between said margin-stops and said margimcounterstop,

a paragraphingstop fixed to one of said marginstops for concomitant screw adjustment, and a second'counterstop for cooperating with said paragraphing-stop.

22.In a typewriting machine, the combination with a letter-feeding carriage, of right and left hand margin-stops for said carriage, a counterstop for co-operating with said margin-stops. coacting margin-regulating screws having a common-"single finger-piece, for varying both lefthand and'right-hand margins byeifecting oppo- I s concomitantly between said: margin-stops and said margin-counterstop,

'zalpa'ragraphingstop fixed to oneof said marginstops for concomitant screw adjustment, a deep indentation stopconnected to the other of said 'margin-stopsifor concomitant adjustment therewith, and a second counterstop for cooperating "with said paragraphin'g and indentation stops.

.In, a type'writing machine, the combination withaletter-feeding carriage, of right and left handmargin-stops forsa'id carriage, a counterstopfor co-operatingwith said margin-stops, coacting marginvregulatingscrews having a common single finger-piece, for varying both lefthandand. right-hand margins by effecting opposite relative adjustments concomitantly between said margin-stops and said margin-counterstop,

a paragraphing stop fixed to one of said marginstops for concomitant screw adjustment, a deep indentation stop connected to the other of said margin-stops by an aifiustable connection to vary the setting of said deep indentation stop independently, and a second counterstop for cooper ating. with said paragraphing-stop and said indentation-stop. s v

24. In a typewriter having a laterally slidable 10 carriage, margingaging and tabulating means comprising a screw-threaded shaft rotatably mounted, margin-gaging stops threaded carried on said shaftfor movement in unison toward or from each other by appropriate rotation of said shaft, tabulator stops slidably carried on said shaft, means preventing rotation of all of said stops, and means connecting each tabulator-stop with the respective margin-gaging stops for corresponding movement therewith.

WILLIAM A. DOBSON. 

